DeterministicESPAsyncWebServer.cpp File Reference

Layer 7 (Application) — HTTP routing and request handler implementation. More...

#include "DeterministicESPAsyncWebServer.h"
#include <string.h>
#include <stdio.h>

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Detailed Description

Layer 7 (Application) — HTTP routing and request handler implementation.

Dispatch pipeline (called from DetWebServer::handle())

handle()
  └─ server_tick()                 ← drain FreeRTOS event queue
  └─ for each slot:
       PARSE_COMPLETE          → match_and_execute()
       PARSE_ERROR             → send(400)
       PARSE_ENTITY_TOO_LARGE  → send(413)
       PARSE_URI_TOO_LONG      → send(414)

Route table Routes are stored in a fixed-size array of Route structs. Both exact and wildcard (suffix *) routes are supported; exact routes always take priority because the loop checks them in insertion order and returns on the first match.

PCB lifecycle in send() / send_empty() Before writing to the PCB the slot is set to CONN_FREE and the pcb pointer is nulled. This mirrors the pattern in transport.cpp:

1. Save a local copy of the pcb pointer.
2. Detach our slot from it (tcp_arg(pcb, nullptr)).
3. Null out conn->pcb and set conn->state = CONN_FREE.
4. Do the write + close/abort on the saved local pointer.

This means any lwIP error callback that fires mid-write sees the slot as already free and takes no action — preventing a double-free scenario.

Definition in file DeterministicESPAsyncWebServer.cpp.